St. Louis Downtown Airport to Portland International Jetport CPS → PWM
945 nautical miles (1,088 statute miles) northeast on a straight line, true course 065°, about 065° magnetic at the departure end (variation 0E). At 120 knots that is 5 h 38 min at the quickest height in today's winds (39,000 ft, a 48-knot tailwind), arriving about 3:49 am EDT (07:49 UTC), after sunset at the destination. For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 1 flights in the DOT's last twelve reported months, the route's page.
The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words
Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.
Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of
- AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 299 to 935 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 448 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 537 to 906 nm out.
- AIRMET ZULU 1C: moderate icing up to 22,000 ft. Over the last 279 nm of the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Over the last 249 nm of the route.
A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from CPS.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 UTC · at 120 knots true airspeed
The eastbound cruising heights for this course (VFR: odd thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 11 forecast points nearest it (STL, SPI, IND, FWA, CMH, CLE, BUF, SYR, ALB, BOS, PWM). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 3,500 ft | 190° at 6 kt | −2 kt | 122 kt | 7 h 45 min | 5:56 am EDT (09:56 UTC) | |
| 5,500 ft | 270° at 5 kt | −4 kt | 124 kt | 7 h 37 min | 5:48 am EDT (09:48 UTC) | |
| 7,500 ft | 300° at 8 kt | −5 kt | 10 °C | 125 kt | 7 h 34 min | 5:45 am EDT (09:45 UTC) |
| 9,500 ft | 300° at 10 kt | −5 kt | 7 °C | 125 kt | 7 h 34 min | 5:45 am EDT (09:45 UTC) |
| 11,500 ft | 300° at 11 kt | −6 kt | 4 °C | 126 kt | 7 h 30 min | 5:41 am EDT (09:41 UTC) |
| 13,500 ft | 300° at 12 kt | −8 kt | -1 °C | 128 kt | 7 h 23 min | 5:34 am EDT (09:34 UTC) |
| 15,500 ft | 300° at 14 kt | −9 kt | -5 °C | 129 kt | 7 h 20 min | 5:31 am EDT (09:31 UTC) |
| 17,500 ft | 290° at 15 kt | −11 kt | -9 °C | 131 kt | 7 h 13 min | 5:24 am EDT (09:24 UTC) |
| 18,000 ft FL180 | 290° at 16 kt | −11 kt | -10 °C | 131 kt | 7 h 13 min | 5:24 am EDT (09:24 UTC) |
| 24,000 ft FL240 | 280° at 20 kt | −17 kt | -21 °C | 137 kt | 6 h 54 min | 5:05 am EDT (09:05 UTC) |
| 30,000 ft FL300 | 270° at 31 kt | −28 kt | -35 °C | 148 kt | 6 h 23 min | 4:34 am EDT (08:34 UTC) |
| 34,000 ft FL340 | 260° at 46 kt | −44 kt | -42 °C | 164 kt | 5 h 46 min | 3:57 am EDT (07:57 UTC) |
| 39,000 ft FL390 | 260° at 50 kt | −48 kt | -50 °C | 168 kt | 5 h 38 min | 3:49 am EDT (07:49 UTC) |
Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.
The forecast points as issued
| Point | From | 3,000 | 6,000 | 9,000 | 12,000 | 18,000 | 24,000 | 30,000 | 34,000 | 39,000 |
|---|---|---|---|---|---|---|---|---|---|---|
| STL | used from 0 nm out; 33 nm from the line | 210/13 | 260/16 17° | 270/21 10° | 280/24 5° | 310/20 -7° | 320/22 -18° | 320/44 -33° | 320/59 -43° | 310/69 -51° |
| SPI | used from 50 nm out; 64 nm from the line | 210/13 | 260/11 17° | 270/18 10° | 290/21 4° | 310/20 -8° | 330/25 -19° | 320/49 -34° | 320/60 -44° | 320/59 -50° |
| IND | used from 100 nm out; 69 nm from the line | 320/10 | 350/30 16° | 350/32 10° | 350/30 4° | 340/31 -10° | 340/42 -21° | 340/49 -37° | 320/46 -41° | 320/47 -47° |
| FWA | used from 249 nm out; 42 nm from the line | 350/9 | 350/24 15° | 360/25 9° | 360/29 4° | 350/31 -10° | 340/39 -22° | 330/40 -37° | 320/38 -43° | 320/48 -48° |
| CMH | used from 299 nm out; 56 nm from the line | 340/14 | 320/13 12° | 350/12 8° | 360/10 2° | 350/27 -10° | 340/20 -22° | 320/31 -35° | 270/25 -39° | 260/32 -48° |
| CLE | used from 348 nm out; 46 nm from the line | 340/5 | 320/13 14° | 300/12 8° | 310/10 2° | 310/14 -10° | 340/14 -23° | 320/27 -35° | 260/28 -40° | 250/36 -48° |
| BUF | used from 498 nm out; 78 nm from the line | 170/19 | L/V 10° | 040/9 6° | 220/8 2° | 230/15 -11° | 220/33 -22° | 220/47 -35° | 230/55 -41° | 230/56 -50° |
| SYR | used from 647 nm out; 36 nm from the line | 160/17 | 200/22 10° | 250/10 6° | L/V 1° | 270/11 -11° | 220/25 -20° | 220/66 -36° | 230/89 -42° | 240/74 -51° |
| ALB | used from 746 nm out; 22 nm from the line | 160/27 | 190/16 9° | 200/29 7° | 230/21 3° | 240/24 -9° | 240/43 -19° | 230/65 -33° | 240/91 -42° | 230/99 -53° |
| BOS | used from 846 nm out; 74 nm from the line | 160/27 | 190/23 9° | 260/20 7° | 260/32 1° | 250/48 -7° | 240/56 -17° | 240/59 -33° | 250/75 -43° | 250/94 -55° |
| PWM | used from 896 nm out; 25 nm from the line | 200/23 | 190/21 5° | 260/23 5° | 270/20 0° | 250/29 -9° | 250/54 -19° | 250/71 -33° | 250/78 -43° | 250/105 -56° |
The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch
| Airport | Where | Conditions | Wind | Visibility | Ceiling | Elevation | Reported |
|---|---|---|---|---|---|---|---|
| CPS Cahokia/St Louis, IL | departure | no report just now | 412 ft | ||||
| GRE Greenville, IL | 40 nm out, 1 nm south of the line | no report just now | 540 ft | ||||
| HUF Terre Haute, IN | 139 nm out, 7 nm southeast of the line, tower | no report just now | 589 ft | ||||
| AID Anderson, IN | 229 nm out, 1 nm east of the line, tower | no report just now | 919 ft | ||||
| MFD Mansfield, OH | 378 nm out, 12 nm south of the line, tower | no report just now | 1,297 ft | ||||
| CLE Cleveland, OH | 418 nm out, 11 nm north of the line, tower | no report just now | 799 ft | ||||
| GKJ Meadville, PA | 488 nm out, 4 nm east of the line | no report just now | 1,399 ft | ||||
| ELM Elmira/Corning, NY | 647 nm out, 16 nm south of the line, tower | no report just now | 955 ft | ||||
| ITH Ithaca, NY | 667 nm out, 1 nm southeast of the line, tower | no report just now | 1,099 ft | ||||
| SCH Schenectady, NY | 776 nm out, 11 nm southeast of the line, tower | no report just now | 377 ft | ||||
| LEB Lebanon, NH | 856 nm out, 19 nm north of the line, tower | no report just now | 603 ft | ||||
| PWM Portland, ME | destination | no report just now | 75 ft |
The highest airport on this list sits at 1,399 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At PWM when you get there the forecast at the estimated arrival, 3:49 am EDT (07:49 UTC)
PWM has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 448 nm along the route · a VIP movement · today · ZOB
- 6/8888 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 13 nm from the route, 468 nm along the route · security · today · ZOB
- 6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 9 nm from the route, 468 nm along the route · a VIP movement · today · ZOB
Daylight
Sunset at CPS 6:27 pm CDT (23:27 UTC), at PWM 6:03 pm EDT (22:03 UTC) (civil twilight ends 6:32 pm EDT (22:32 UTC)). At 120 knots the arrival at PWM is before sunrise there (6:51 am EDT (10:51 UTC)).
Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.
Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads
Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: St. Louis Downtown Airport, Portland International Jetport.